samira-t/akka — comment on commit 1fc202eb1efa9deb6c39741966c52e2309e5def9
File: akka-setack/src/main/scala/akka/setack/core/TestMessageInvocation.scala line 70
By samira-t:

Because for example in the case that the message is a string "foo", == operator won't work. Two usages of "foo" are not == but they are "equal"